Motor-driving device for slicing machines



Aug. 3,1921% 1,594,497

R. CRAIG ET AL I MOTOR DRIVING DEVICE FOR SLICING MACHINES Filed ust 16, 1922 2 Sheets-Sheet 1 INVENTORS R WM MAIL! YEW A TTORNEYS.

Aug. 3. 1926.. 1,594g497 R. CRAIG ET AL I MOTOR DRIVING DEVICE FOR SLICING MACHINES Filed August 16,1922 2 Sheets-Sheet 2 T NVENTORS Patented Aug. 3, 1925.

stares 1,594,497- PATENT OFFICE.

ROBERT CRAIG AND GEORGE E. WOOD, 0F DAYTON, OI-IIO, ASSIGNORS, BY MESNE AS- SIGNMENTS, TO DAYTON SCALE COMPANY, OF DAYTON, OHIO, A CORPORATION OF NEW J ERSEY.

Application filed August 16, 1922. Serial No. 582,106.

This invention relates to improvements in motor driving devices for slicing machines and more particularly is directed to an improved motor drive device for a bread cutter or slicer of the type shown and described in the patent to A. R. Mulder, No. 1,289,516.

Bread cutters of this general type usually include a handwheel or fly-wheel usually directly mounted upon the drive shaft or knife shaft of the machine. The handwheel is provided with. a grip or handle which is turned by the operator.

The present improvement is directed to a simple, motor mountingand driving device which may be readily attached to machines of this type to permit the same to be driven by power.

Broadly, the invention is directed to an improved motor mounting 1n which the m0- tor assembly may bebodily swung up or down to bring a friction driving pulley into or out of engagement with the periphery of the handor fly-wheel. A controlling switch is also provided which switch is interconnected to the motor displacing means whereby current will be supplied to the motor when the driving pulley is engaged and whereby the motor circuit will be automatically interrupted upon the disengagement of the pulley. Resilient means such as a spring are provided for holding the driving pulley in engagement with the flywheel and this spring also serves to close the switch.

In the drawings:

Fig. 1 is a side view of one end of the machine.

Fig. 2 is an end detail view with the driving pulley in engagement.

Fig. 8 is a similar view with the pulley disengaged.

In more detail, 10 is the part of the machine frame which rotatably carries the drive shaft 11 having a fly-wheel or handwheel 12 mounted upon one end thereof. 13 is the usual hand-grip on the hand-wheel. Extending upwardly from and fixed to the machine frame are a pair of brackets 14 which carry pivot studs 15, which extend into depending lugs on the motor supporting frame or sub-base 16. Fixedly mounted upon the sub-base is a motor 17 having a friction driving pulley 18 extending over the periphery of the fly-wheel. Also fixed to the sub-base is a switch housing containmg a rocking type knife switch and having a link 19 connected tothe switch blade 20,

and having its lower end fixedto one of the brackets 14.

nected to the sub-base 16 and to the main.

frame 10.

To shift the, motor'driving pulley out of contact with the fly-wheel and toc'oncurrently open the switch 20,"there is provided a bell crank shaped handle 22. This isp V- oted upon one of the brackets 14. A toggle link 23 is connected to the bell crank and at its upper endis provided with a shouldered portion 24 adapted to engage the lower surface. of the sub-base. The upper end of the link 23 has an extended guiding finger portion 25 which extends through a slot or hole in the sub-base.

To disengage the driving pulley and open the switch the operator depresses the handle 22 and swings it from the position shown in Fig. 2 to the position shown in Fig. 3. Toggle link 23 is elevated and abutting against thesub-base swings it about its pivots, stretching spring 21 and opening the knife switcl- 2-3. The machine may be operated by hand in the usual manner. If it is now desired to drive the machine by the motor, the operator lifts the handle 22 sufficiently to break the toggle formed by link 23. Thereafter the spring 21 draws downwardly upon the sub-base and enga es the driving pulley yieldingly with the fl wheel. The downwardly swinging movement of the motor sub-base also causes the switch 20 to be closed and supply current to the motor, from the supply line 26.

Preferably the driving pulley is provided with a protecting housing or cover 27 which is fastened to the end of the motor frame as shown in Fig. 1.

The motor driving attachment may be readily applied to machines already in use,

as will be readily understood. All parts indriving pulley at each time the motor drive i is suspended, the contour of the driving pulley 1S preserved and flattening which would otherwise develop it the machine should stand idlefor extended time periods, is obviated.

WVhat we claim is 2- v 1. In a device of the, class described, in

combination with a pivotally supported.

motor base, of a motor carried thereby and having a driving pulley, resilient meansfor swinging the motor base and maintaining the driving pulley in engagement with a -wheel to be driven, and means including a toggle linkage and a manually operable handle for oppositely swinging the motor frame to disengage the pulley and to maintain such disengagement upon the release of the handle.

' 2. In a device of the class described, in

combination with a pair of supporting brackets, of a motor sub-base pivoted thereto, a motor carried upon said sub-base and having a driving pulley, a spring connected with said sub-base and normally tending to draw said driving pulley into engagement with a wheel to be driven thereby, a bell crank hand lever pivoted to one of said brackets, a toggle link'connected therewith and extending into cooperative relation with the 1sub-base, sa d bell crank andtoggle link upon being swung in one direction being adapted to disengage the driving pulley and to thereafter maintain such disengagen'ient, and when swung in the opposite direction permitting the driving pulley to engage base pivotally moimted upon said brackets,

a motor carried thereby, a driving pulley thereon, a hand lever having a locking toggle link for disengaging the driving pulley and hand wheel by swinging the motor sub-base, a spring for engaging the driving and driven pulley and yieldingly maintaining the same in contact,- said hand lever being manually adjustable to break the'toggle lock and permit the spring to draw thevp-ulley and wheel together.

In testlmony whereof we hereto a'fliX our signatures. I

ROBERT CRAIG. V "GEORGE IVOOD. 

